Why do you keep making reference to "shield"? The term is irrelevant to this particular discussion.
Again, both RCA and XLR interfaces require a minimum of two traditional conductors. Shielding is optional in both cases.
And just to remind you what this particular discussion is, it has to do with your following claim:
The minimum amount of conductors for an RCA cable is 1 (signal). The minimum amount for an XLR cable is 2 (hot, neutral).
Edited by Steve Eddy - 7/20/11 at 1:51pm